3m Uninsulated Semi-rigid Flexible Ducting Diameter:224mm Features a mesh screen for

Features a mesh screen for effective filtration without compromising ventilation

and of course

Allows ventilation without active fan operation

dust extraction

Does not emit toxic gases in the event of a fire

3m Uninsulated Semi-rigid Flexible Ducting Diameter:224mm Features a mesh screen forUninsulated semi rigid flexible and fire resistant ducting Complies with the requirements of DW144 Excellent friction loss characteristics Suitable medium, and low pressure applications Constructed from corrugated aluminium strip spirally wound to produce a double overlapped joint ensuring durability in use Can be utilised for hot air exhaust connections between fireplace fireboxes and for building air heating ductwork Does not contain PVC, no toxic